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Arrowhead Pool Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  | |  |  |  | | | |  | | |
| Mostly Sunny | Clear | Sunny | Rain/Snow Showers | Chance of T-Storm | Partly Cloudy | Mostly Sunny | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Rain/Snow Showers | Snow and Rain |
| Hi: 51°FHi: 11°C | Lo: 31°FLo: -1°C | Hi: 51°FHi: 11°C | Lo: 31°FLo: -1°C | Hi: 50°FHi: 10°C | Lo: 35°FLo: 2°C | Hi: 51°FHi: 11°C | Lo: 35°FLo: 2°C | Hi: 51°FHi: 11°C | Lo: 35°FLo: 2°C | Hi: 39°FHi: 4°C | Lo: 29°FLo: -2°C |
| POP: 30% | POP: 30% | POP: 40% | POP: 90% | POP: 100% | POP: 80% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1017 AM MDT Sun Oct 18 2026 
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Issued: 524 AM MDT Sun Oct 18 2026
Key Messages
- Slightly cooler today, but still mild with highs in the upper 50s and lower 60s.
- A weak weather system to the south will bring increased clouds across southern Wyoming this evening, with a very low chance (5%) of a virga shower overnight.
- Another weak system moves across western Wyoming on Tuesday, with a slightly better chance (30-40%) of a shower during the afternoon.
Discussion
... Issued at 220 AM MDT Sun Oct 18 2026
Ridging begins to flatten today as the next coastal trough begins ...